CVE-2023-43303Network attack vector

Unauthorized notifications via leaked channel access token

Published Dec 7, 2023 · Updated Jul 9, 2026

Channel access token exposure in the craftbeer bar canvas mini-app on LINE 13.6.1 allows remote attackers to send malicious notifications. The CNA states that captured network traffic exposes the token but does not identify the request, transport failure, or code locus. Network access sufficient to capture the token is required; possession permits forged notification delivery, with no published code-execution or service-interruption impact.

CVSS severity8.2
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Channel access token exposure in the craftbeer bar canvas mini-app on LINE 13.6.1 allows remote attackers to send malicious notifications. The CNA states that captured network traffic exposes the token but does not identify the request, transport failure, or code locus. Network access sufficient to capture the token is required; possession permits forged notification delivery, with no published code-execution or service-interruption impact.

The record

CVE
CVE-2023-43303
Published
Dec 7, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1040Network Sniffing

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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